DNS not working in Windows WSL Ubuntu Shell

[wayneski]

internal DNS to access some of our internal services

this used to work though, and today it doest .... what could have changed? 

Behind a Fortinet SSL VPN

[Markus_M]

Hi wayneski,

go with a packet capture when a DNS query is made.
From the WSL CLI you should be able to run some commands to see who the DNS server of that virtual system is.
sudo service systemd-resolved status
or so should give that output. Did the SSLVPN change from a split tunnel DNS to a full tunnel? I would not be surprised if the WSL may not notice that and send DNS queries to its regular intended server which however no longer receives those queries.

Best regards,

Markus

[wayneski · Accepted solution]

hello, thanks for answer...

i am not sure if we switched from split tunnel to full tunnel dns,I would need to check with out IT dept, but i did fix the issue with a WSL setting

networking mode mirrored instead of NAT and now it works again for both on and off VPN

many thanks!

[Markus_M]

Hey,

thanks for letting us know. This might help someone else as well, you should mark your post as solved, if possible. Was there a reconfiguration of that networking mode on WSL, as it worked before?

[wayneski]

Ok sure, marked as answer. No reconfiguration needed, just open "WSL Settings" app, go to Networking -> Networking mode and select Mirrored and restart WSL.